Electronic carillon



y 1959 E. NOWAKOWSKI 2,886,999

ELECTRONIC CARILLON Filed Feb. 20, 1956 3 Sheets-Sheet l POWER SUPPIX TERMINAL BOX L 19 TO :2 ROLL PLAYER 3 AMPLIFIER I60 E I4I 1 I 0 I63 -fi TO LOUDSPEAKER INVENTOR.

E NOWAKOW K ATTORNEY May 19, 1959 E. NOWAKOWSKI ELECTRONIC CARILLON 3 Sheets-Sheet 2 Filed Feb. 20, 1956 y 9, 1959 E. NOWAKOWSKI 2,886,999

ELECTRONIC CARILLON Filed Feb. 20, 1956 s Sheets-Sheet s IZIO.

United States Patent "ice ELECTRONIC CARILLON Edward Nowakowski, Rochester, N.Y., assignor, lby mesne assignments, to Telematics, Inc., a corporation of Illinois This invention relates to electronic carillons and more particularly to mechanical structures for such carillons.

Carillons or bell instruments were first designed to use campanitorm type'bells. These instruments may use huge bells which run to sizes where a clapper alone may weigh as much as three to four hundred pounds. Modern science has brought weight, size and maintenance factors of carillons or bell instruments to a negligible point by making use of electronic techniques. For example, an electronic instrument may be provided with small tuned vibrators or tone generators which may be of any suitable form such as rods, bars, tubes, or the like. These vibrators or tone generators may be caused to vibrate by any suitable means such as by striking, plucking, or the like. When vibrated, tone generators produce a complex pattern of mechanical motion comprised of a plurality of partial modes of vibrations which are, for the most part, inaudible. An electronic instrument may be,

provided with a plurality of components which are adapted to set tone generators into motion, and to pickup and convert that motion into undulating electrical currents. These components must be located in space with extreme accuracy and precision with respect to the location of the tone generators. In the past, problems relating to this precise location of components have been solved by providing very complicated mounting structures which introduce cost, installation and maintenance problems.

An object of this invention is to provide a new and improved electronic instrument.

Another object of this invention is to provide means for mounting components that are necessary to produce and pick-up vibrations required to provide a campaniform type bell tone.

Still another object of this invention is to provide mechanical structure of extreme simplicity for adjustably mounting and supporting components that are necessary for electronic instruments.

My invention accomplishes these and other objects by providing simple and economical means for adjustably positioning the various components that are necessary for the production of proper tones by electronic instruments. More particularly, support means is provided in the form of suitably mounted, movable panels adapted to carry many components that form electronic instruments. One of these components (hereinafter called mass element) is a structure which is massive or substantial when compared to characteristics such as the size and proportion of vibrators or tone generators that are used in an electronic instrument. This massive structure or mass element may be provided with any suitable means for securing one or more vibrators or tone generators in an operative position. For example, in a preferred embodiment of my invention, vibrators or tone generators may be end-clamped to the mass element in spaced, parallel relation; although, other clamping arrangements may be used according to the tonal structure that is required from the electronic instrument.

2,886,999 Patented May 19, 1959 Another component that may be carried by a support means or movable panel is the vibration producing means (hereinafter called striker or striker assembly) which is utilized to set vibrators or tone generators in motion. My striker assembly may take any of many Well known forms; for example, it may be arranged to strike vibrators or tone generators under the influence of either electrical or mechanical forces. One form of striker assembly that may be used is arranged so that an armature is thrown upward by magnetic forces and returned to normal by gravity forces. The accompanying drawings show this striker assembly as supported by suitable mounting means in the form of a slidable or otherwise longitudinally adjustable device (hereinafter called mounting block") which is adapted for positioning at a spot which is selected according to the characteristics of a tone generator. Means associated with this mounting block is provided so that the striker assembly may be adjustably supported toward or away from a tone generator.

Still other components which may be carried by a support means or movable panel are transducer means for electrically picking up the vibrations or sound patterns from tone generators. As in the case of the striker assembly, We are not concerned with the details of the particular transducer or pick-up means that may be used. Any suitable type of pick-up means may be used; for example, the pick-up may be in the form of a coil which is influenced by mechanical excursions of a tone generator. These pick-up means are positionable in a manner which is similar to the arrangement described above in connection with striker assembly mountings.

Still another component that may be carried by a support means or movable panel is current carrying or other suitable electrical circuit means which may take any of several well known forms, one of which includes a device that is sometimes called a printed circuit. The current carrying means may also include any desired electrical component such as resistance adjusting means, which may take the form of potentiometers, for example. If desired, a plurality of these resistance adjusting means may be provided and connected in a manner such that the output of each pick-up means may be controlled on an individual basis.

The foregoing summary of invention has been set forth in general terms to illustrate an arrangement which may be adapted to many different types, configurations, and modifications of electronic instruments. I have found it convenient to show a preferred embodiment of my invention in the drawings in connection with an endclamped tone generator which takes the form of a bar having a rectangular cross-section. This particular type of tone generator is also shown in Patent 2,690,091 which was granted to Frank H. Slaymaker and Willard F. Meeker on September 28, 1954. Patent 2,690,091 and the subject application have the same assignee. One of the modifications to the subject invention which is provided to accommodate the rectangular tone generator is found in means which is provided to support two transducers or pick-up means per tone generator. The attached drawings show this pick-up support means (hereinafter called ridge member) as having a V or ridge shape cross-section; although the particular cross-sectional shape is not important. For example, this member could be a U or C or other shape. An important feature is means which provides for longitudinal adjustment of two pick-up means along the length of a single tone generator and in a desired plane of vibrations.

In greater detail, the particular ridge member which I have shown may be made in any suitable manner, such as by folding or bending sheet metal, for example, to form two inclined, slanted or sloped surfaces, each of which is provided with means in the form of a'longitudinal a a slot, groove or opening into which a movable or otherwise adjustable device (hereinafter called mounting block) may be fixed. A pick-up means may be adjustably positioned on or in this mounting block toward or away from a tone generator according to the needs of the electronic instrumer Pick-up means and associated mounting blocks may be positioned on each of two sloped surfaces of a single ridge member which in turn may be positioned with its axis substantially parallel to a tone generator. In this manner, each of a plurality of pick-up means may be positioned independently. Furthermore, the angle between the two sloped surfaces, the dimensions of a mounting block and the nature of the association between pick-ups and mounting blocks may be modified to position pick-up means in a desired plane of vibrations.

Still another feature which may be utilized further to simplify my invention is an arrangement by means of which a movable panel means is adapted to carry components on each of its sides. In this manner, many items may be utilized to serve two or more purposes. For example, the same bolts, holes, slots, current carrying means, etc., may be adapted to serve components on each side of a movable panel. Further, the fact that a panel is movable serves to provide for economical installation and maintenance because workmen may approach and work on components from the most convenient angle thereby requiring only a few general purpose tools.

These and other objects will be obvious to those skilled in the art by making reference to a description of the attached drawings, in which:

Fig. 1 shows in perspective an electronic carillon; Fig. 2 shows a cross-sectional, end view taken along line 2 2 of 'Fig. '1;

Fig. 3 shows a plan, top view of door 101; Fig. 4 shows a plan, view of the section shown in Fig; 2; i

Fig. 5 shows a modification of the view that is shown in Fig. 4; and,

'Fig. 6'sh0Ws an exploded view of one form in which fastening means 204 may be made.

' i I have tried to show specific items and to use simple terms where possible to facilitate an understanding of my invention. However, I want it understood that the showing and use of these specific items and terms is not to act in any manner as a disclaimer of the full range of equivalents which is normally given under established rules of patent law. For example, I have shown pivotally mounted panels when slidable panels might be used and I have shown gravity returned strikers when gravity release'strikers might be used. In a similar manner, many other examples of possible equivalents might be cited.

Next, reference is made to specific details of my invention as shown in Fig. 1. Means is provided for mounting one or more movable panels, such as 101 and 101a. For a want of a better name, this means is called a back plate; although the use of the term back is not to imply that the carillon must be positioned on its back or in an upright position or otherwise. Back plate 1 may be provided in any suitable form; however, I have found that it is convenient to design the plate to be hung upon the wall. Back plate 1' is provided with power supply and terminal box 150, an amplifier 160, and any other suitable common electrical equipment that might be required. Supports 2 and 3 are mounted on back plate 1 to support two movable panel means 101 and 101a, which are shown in Fig. 1 as pivotally mounted at 4 and 5, for example, so that the panels may be swung parallel to back plate 1 for operation, or opened, as required, for maintenance. It should be obvious that it is only necessary to add further movable panels to the assembly if additional mounting space is required. Panel 101 is shown as open while panel 101a is shown as partly closed. Any suitable means, not

shown, may be provided to hold the panels in any desired opened or closed position.

Each of the panels such as 101 may carry equipment on each of its sides thus greatly increasing the amount of equipment that might be carried by a single panel if it were mounted in a stationary position. For example, tone generators maybe mounted in side-by-side, spaced, parallel relation on opposite sides of the panel. To illustrate, tone generators 117 and 118 are shown on two sides of panel 101, while tone generators 117a and 118a are shown on two sides of panel 101a. Only the top and bottom groups of tone generators and associated components have been shown on each panel; however, it should be obvious that any number of tone generators may be carried by each panel. Astiifening edge or rib, such as shown at 102, may be added to each panel means to provide suitable rigidity.

Mass means is provided for supporting tone generators. That is, a mass element such as item 103 may be arranged on each side of panel 101 adjacent the edge nearest the pivots. Mass element 103 is provided with a plurality of clamping means (to be described later) for holding one or more tone generators in an operative position.

Means is provided for supporting pick-up means adjacent tone generators. The drawing shows this support as ridge element 116 which is supported by panel 101 in a position adjacent a tone generator. The ridge element is formed by two sloped or slanted surfaces, the apex of which forms an angle that is selected according to the plane in which pick-up means are to be positioned. Each sloped or slanted surface has a slot or groove which is in spaced parallel relation to a tone generator when mounted in an operative position. Referring to these elements as they are shown in Fig. 1, the upper slot is provided to cooperate with mounting block 110, while the lower slot is provided to cooperate with mounting block 111. Each mounting block is arranged to carry transducing or pick-up means (to be explained later). These mounting blocks may be located and clamped or locked into position at any desired spot along the length of an associated slot or groove according to the vibration pattern of an associated tone generator. For example, if all partial modes of vibration are to appear in a tone as reproduced, pick-up means adapted to convert mechanical vibrations into undulating electrical currents may be located at or near one end of an associated tone generator; ifa particular mode of vibration is to be accentuated, pick-up means may be located near a loop of that mode; or, if a particular mode of vibration is to be minimized, pick-up means may be located near a node of that partial.

It may be assumed that, when struck, each tone generator is arranged to provide desirable mechanical vibrations in two planes which are positioned at right angles to each other and which intersect at the tone generator.

In this case, it is necessary to position pick-up means in either or both of these two planes. It is assumed that the apex of ridge element 116 is formed at an angle of about 90 degrees, that mounting blocks and 111 are rectangular in cross-section, and that pick-up means are extended at right angles from the broad face of the mounting blocks. In this manner, two pick-up means are positioned to be excited by vibrations produced in planes that are lying at right angles to each other. It should be obvious that other planes could be accommodated by changing any of the variables listed above, i.e., the apex angle, the cross-sectional shape of a mounting block, and/or the angle at which a pick-up means is extended from a mounting block.

Means is provided for mounting striker assemblies to be adjustably positionable along the length of tone generators. That is, groove or slot 123 is shown in Fig. l in a position which is below ridge element 116. Mounting block 114 is adapted to be positioned and locked or clamped at a spot or location selected along the length of groove or slot 123 according to the vibration pattern of tone generator 117. This location may coincide with a partial mode of vibrations which is to be accentuated. Striker assembly 115 is associated with block 114 in a manner such that tone generator 117 is caused to vibrate under its influence. The striker assembly may in turn be controlled from a suitable keyboard (not shown).

Current carrying means is provided to complete desired electrical circuits. More specifically, on one side of panel 101 there is a suitable current carrying means which may take the form of circuit board 104. A plurality of current control means which may be in the form of potentiometers, such as 105 and 106, for example, may be provided and connected so that the output of an individual pick-up means may be controlled according to the tuning requirements of a tone generator. Pick-up means, striker assemblies, and the like, that are carried on the other side of panel 101 are connected by electrical wiring or other suitable means extended through holes or openings in panel 101 to current carrying means 104. For example, holes 131, 133 and 134 connect the items on the upper, front side of panel 101a to current carrying means on the back of that same panel. Similarly, pick-up means associated with tone generator 118 may be connected to current control means 105a and 106a and hence to current carrying means 104 by wires 91 and 92 respectively.

Current carrying means 104 also provides means for electrically controlling the striker assemblies, e.g., via the circuit including wiring 109. A suitable connecting element 141 is provided to engage the lower portion of current carrying means 104 for completing electrical circuits to components carried by panel 101. This connecting means may take any of a number of forms; however, I have found it convenient to use a friction-held device of the type which is commonly known as a jack. Connecting element 141 may then be connected by means of cabling 142 to power supply and terminal box 150. A first cable 151 leads from terminal box 150 to any suitable control or operating device such as a plurality of switches operated by a piano keyboard from which the electronic instrument may be played. That is, a striker assembly may be actuated each time that a switch is closed responsive to the depression of a key on this keyboard. Another cable 152 connects the outputs of pick-ups from terminal box 150 to amplifier 160 from which the signal is sent over cable 162 to the loudspeakers.

Fig. 2 shows an end view of panel 101 taken along lines 22 of Fig. 1. Ridge elements 116 and 116a, disposed in opposing relation on either side of panel 101, may be made by any suitable means; however, as explained above, I have shown them as made of sheet metal which is formed or folded to provide an apex angle, A, of approximately 90 degrees, and to provide fastening or lip portions adjacent the outer edges, as at B, for example. These lip portions may be used for securing the ridge elements to panel 101. The same fastening devices, holes, spacers and the like may be used to secure ridge element 116, ridge element 116a and current carrying means 104 to panel 101.

' To digress from the description of Fig. 2 for a moment, one means for fastening these components to panel 101 is shown in Fig. 6. This means may correspond to items 200, 201 and 202 in Fig. 2. In greater detail, a hole 602 is provided in panel 101 on one side of which there is a spacer means 603 that has been drilled and tapped at 604 and threaded at 605. This spacer means may be welded, press fitted or otherwise fastened to panel 101, or may be a separate element, as required. A first ridge element 116a is fastened on one side of panel 101 by holding means 600 which is fitted through holes 601 and 602 and driven into tapped opening 604. Current carrying means 104 may be attached to the other side of panel 101 by fitting opening 606 over threaded end 605 after which suitable locking means 607 may secure current carrying means 104 in position. Then, hole 608 of ridge element 116 is fitted over threaded end 605 and locked into position by suitable locking means 609. In this manner either of the ridge elements, 116a or 116, or current carrying means, 104, may be replaced with a minimum of effort. Also, a minimum number of assembly parts hold a maximum number of elements since the same fasteners secure parts to both sides of panel 101. It should be obvious that Fig. 6 shows only one of several means for providing a similar result.

Returning to the description of Fig. 2, each ridge element may be provided on each of its sloped surfaces with a suitable elongated groove or slot means, such as and 10011, for example. Referring to the upper side (as shown in the drawing) of ridge element 116, bolt 210 may be projected through mounting block 110, slot 100a and suitably secured by any means, such as by twin nut 211, for example. A twin nut may be made in the form of an elongated strip or piece of material having a tapped hole adjacent each end. A bolt is threaded into each hole so that the material forming the twin nut is restrained from turning, thus eliminating the need for using a wrench behind a ridge element. It should be obvious that any clamping device may be used at this point provided that mounting block is positionable along the length of ridge element 116. The assembly procedure is to place a mounting block near the end of ridge element 116, to hold a twin nut on the underside of ridge element 116, to start two bolts such as 210, for example, into twin nut 211, to slide the mounting block, bolts and nut to a desired location along the length of slot 100a and then to tighten the bolts, thereby locking the mounting block into position.

Means is provided for mounting or positioning pick-up means on or in each mounting block that is supported on one of the sloped surfaces of ridge element 116. The particular device that is shown in my drawing provides a hole or aperture within each mounting block. A suitable pick-up support such as item 113, for example, may be inserted through this hole. The support member may be slidably positioned within this hole toward or away from tone generator 117 after which a clamping means, that may be in the form of set screw 240, is driven to lock support member 113 into position. Each support member, such as 113, for example, is provided with pick-up means, such as 113a, adjacent its outer end. Each pickup means is thereby positioned at a proper distance from its associated tone generator and in a proper plane to be excited by vibrations from a single side or edge of the rectangular cross-section of that tone generator. For a more detailed explanation of this type of tone generator, see the aforementioned U.S. Patent 2,690,091 that was granted to Frank H. Slaymaker and Willard F. Meeker on September 28, 1954.

Means is provided for locking one or more tone generators to the mass element. This means may take any suitable form; however, I have shown it as an opening which is provided in mass element 103 to receive and clamp each tone generator such as is shown by item 117. Locking clamp 222 which may be somewhat V shaped in cross-section is adapted to slide within the opening provided for clamping or set screw 121. To install tone generator 117 it is only necessary to back-off set screw 121, to move locking clamp or V block 222 away from the hole, to position tone generator 117 within the hole, and then to tighten locking clamp or V block 222 against the tone generator by clamping means such as set screw 121. In this manner, tone generator 117 is end-clamped firmly to mass element 103.

Means is provided for mounting striker assembly 115 in a proper position along the length of tone generator 117. Slot or groove 123, formed in panel 101, is shown in Fig. 2 as provided immediately beneath ridge elements 116 and 116a. As indicated above, suitable mounting blocks 114 and 114a may be positioned along the length of this slot at which point they may be locked or clamped into position, as by means of screws or bolts like 205, for example. In a preferred embodiment of my invention, means is provided for mounting or positioning a striker assembly 115 on or in each mounting block 114 and 114a. More particularly, I provide an opening or aperture into which striker assembly 115 may he slipped or fitted to a proper distance from tone generator 117 :after which clamping means in the form of set screw 230 may be utilized to lock the striker assembly 115 into position. In the interest of economy, it may be desirable .to make all of the mounting blocks, both pick-up and striker, in identical form.

Referring to Fig. 3, a top view of the section that is also shown in Fig. 2, ridge elements 116 and 116a are shown together with slots 100a and 1001) into which fastening devices such as bolts may be fitted so that pick- .up mounting blocks may be slidably positioned to a suitable location along the length of associated tone generators 117 and 118. Fig. 3 shows tone generators 117 and 118 in position. This view has also been provided to show a manner in which fastening devices may be reduced to a minimum; for example, the lip portion of each ridge element is arranged with mounting holes drilled nearer to one of its ends than corresponding holes which are drilled at the other end. That is, if ridge element 116 is re moved and rotated 'by 180 degrees, it may be fastened in an ofi-set position as shown by ridge element 116a. In this manner, ridge elements having the same design may be used interchangeably for both sides of panel 101 and still allow mass elements 103 and 103a to be ofi-set as shown in the drawing. It may be desirable to oil-set mass elements in this manner so that striker support mounting blocks may be positioned in the same slot or groove in the manner explained below in connection with the description of Fig. 4. This construction not only reduces the number of support means, fastening devices, and the like, but also reduces the number of holes and grooves, etc., that must otherwise be formed in panel 101.

Fig. 4, a side view of the section that is also shown in Figs. 2 and 3, is useful for illustrating a manner in which costs have been reduced by eliminating one need for duplicating parts. Mounting blocks 114a and 114, which are adapted to carry striker assemblies, are clamped into groove or slot 123 by means of a plurality of screws, bolts, or other suitable fastening devices. When these bolts or other fasteners are loosened, blocks 114 and 114a may be slidably positioned in slot 123. As pointed out above, it is desirable to strike a tone generator at a particular spot according to the desired vibration pattern.

This spot may vary as the length of the tone generator varies to produce tones of different pitch; however, this natural variation, per se, may not always be sufiicient to allow room for sideby-side positioning of mounting blocks 114 and 114a in the same slot or groove 123. If it is desirable to provide this side-by-side mounting, mass elements 103 and 103a may be off-set with respect to each other, as indicated in Fig. 3. The head of belt 301 in Fig. 4 also indicates the manner in which the mass elements may be off-set.

Fig. 5 shows an alternative method of mounting striker assemblies. In this embodiment, two grooves or slots 501 and 502 are provided so that mounting blocks for striker assemblies may be positioned on opposite sides of panel 101 and in spaced parallel relation instead of in the off-set position that is shown in Fig. 4. If this method is used, mass elements 103 and 103a (Fig. 3) may be oppositely mounted in parallel relation. In this case, the same bolts may be used for securing the mass elements to both sides of the panel. Also, if two slots are provided as shown in Fig. 5 there is no need for off-setting ridge elements 116 and 116a as shown in Fig. 3.

While I have shown and described a single embodiment of my invention, it should be obvious that various modifications may be made by those skilled in the art without departing from the scope of my invention. For example, I have shown my invention as associated with tone generators that are made in the form of a bar having a rectangular cross-section. The invention could be modified to provide for tone generators having other crosssections, thereby eliminating the need for one set of pick-up means per tone generator. Furthermore, my support panel may be modified to form a multisided device, having three or more sides, that is mounted for rotation. Therefore, it is my intention to claim not only the particular embodiment shown but also all modifications which may fall within the true spirit of my invention.

What is claimed is:

1. An electronic instrument comprising support means movable to one position for operation and another for service, a plurality of elongated tone generators, a mass element secured to said support means, means associated with said mass element for carrying said tone generators, striker means for percussively causing said tone generators to vibrate, means for converting mechanical vibrations of said tone generators into undulating electrical currents, and means for adjustably locating said two last named means at desired positions along the length of and toward or away from said tone generators.

2. An electronic instrument comprising multisided support means movable to one position for operation and another for service, a plurality of elongated tone generators, mass element means carried on each side of said support means, means for operatively associating said tone generators with said mass element, striker means for selectively and percussively causing selective ones of said tone generators to vibrate, transducing means for converting said vibrations into electrical currents, and means including said support means for carrying said two last named means at a desired location in space which may be changed with respect to distances measured along the length of and toward or away from said tone generators.

3. An electronic instrument comprising panel support means, means for supporting said panel for positioning between a first position for operation and a second position for maintenance, a plurality of elongated tone generators, means carried by said panel and having massive characteristics when compared to the characteristics of said tone generators, means for ope-ratively associating said tone generators with said mass means, striker means for percussively producing vibrations in said tone generators, two pick-up means per generated tone, said panel being provided with a plurality of longitudinal attaching means arranged parallel to said tone generators, means connected to said attaching means for selective location along the length of said tone generators, and means including said last named means for positioning said striker means and said pick-up means toward or away from said tone generator.

4. The electronic carillon of claim 3 wherein said means connected to said attaching means comprise a plurality of mounting blocks.

5. An electronic instrument comprising support means movable to one of a plurality of positions, a plurality of elongated tone generators carried by said support means, ridge element means having two sloped surfaces and carried by said support means, said sloped surfaces being positioned parallel to said tone generators, transducer means, mounting means carried on each of said sloped surfaces for positioning along the length of said tone generator for carrying said transducer means, and means including said last named means for positioning said transducer means toward or away from said tone generator.

6. The electronic carillon of claim 5 wherein each of said sloped surfaces is provided with an elongated slot extending parallel to one of said tone generators, said mounting means being positionably carried by said slot, and means for locking said mounting means into said slot.

7. The electronic carillon .of claim 5 wherein said tone generators are substantially rectangular in cross-section, said sloped surfaces being positioned at an angle such that each of said transducer means is positioned to be excited by vibrations radiating from one side of said cross-section.

8. An electronic instrument comprising movable means for supporting components of said electronic instrument at one location for operation and at another location for maintenance, a plurality of elongated tone generators each having a rectangular cross-section, means having massive characteristics when compared to the characteristics of said tone generators for operatively associating said tone generators with said movable means, means for striking each of said tone generators on a corner of said rectangular cross-section for causing said struck tone generator to vibrate in two planes of vibration, means for mounting said striking means on said movable support means at particular locations along the length of said tone generators, means for selectively positioning said striker means toward and away from said tone generator a plurality of transducer means for converting mechanical vibrations of said tone generators into electrical currents, and means for slidably supporting at least one transducer means in each of said two planes, said last named means being arranged to provide for selectively locating each transducer at a desired position in the particular one of said planes in which it is to operate.

9. The electronic instrument of claim 8 wherein said means for supporting said transducer comprises ridge means formed of at least two sloped surfaces each of which is provided with slot means extending parallel to one of said tone generators, mounting block means slidably positionable in said slot means, and means including said mounting blocks for carrying said transducer means.

10. An electronic carillon comprising pivoted door means movable between operate and service positions, a plurality of mass elements, each side of said door having at least one mass element attached thereto, a plurality of tone generators each being rectangular in cross-section,

means for end-clamping said tone generators in spaced parallel relation to said mass elements, a plurality of pickup and striker means, support means for adjustably positioning said pick-up and striker means toward and away from said tone generators, means extending parallel to said tone generators for adjustably positioning said support means along the length of said tone generators and circuit means carried by said panel for interconnecting said pick-up and striker means.

11. An electronic carillon comprising panel means movable between operate and service positions, a plurality of tone generators each being rectangular in cross-section, means for end-clamping said tone generators in spaced parallel relation on opposite sides of said panel, a plurality of pick-up and striker means, support means for said pick-up and striker means, means comprising a ridge element having two sloped surfaces extending parallel to said tone generators for adjustably positioning said support means along the length of said tone generators, said support means comprising mounting blocks on each of said sloped surfaces for adjustably positioning said pickup and striker means toward and away from said tone generators, each of said pick-up means being oriented to be excited by vibrations from one edge of said rectangula-r cross-section.

References Cited in the file of this patent UNITED STATES PATENTS 1,307,466 Van Heusen June 24, 1919 2,015,014 Hoschke Sept. 17, 1935 2,413,062 Miessner Dec. 24, 1946 2,452,897 Bossard Nov. 2, 1948 2,570,178 Zuck Oct. 2, 1951 2,606,474 Kunz Aug. 12, 1952 2,622,467 Kunz Dec. 23, 1952 2,690,091 Slaymaker et a1 Sept. 28, 1954 2,722,154 Neumark Nov. 1, 1955 

